Aliasing In AVCHD Footage, Not In FCP7!

Hi,
I'm working with some AVCHD 1080p Footage in Premiere CS6. I made the move away from FCP7 hoping I could get high quality results in Premiere.
However...
In both "natively editing" and via Prelude Ingesting the AVCHD to ProRes422, the footage is Aliased (a.k.a. Jaggies). Both in the Program Monitor AND after Export.
However, a side-by-side comparison to the same footage Log & Transferred in FCP7 shows that the FCP7 footage is not Aliased! Same settings. The files are the same size, and the same Data Rate. This only happens in the Adobe Workflow.
In my Media Encoder settings, I have tried both Maximum Render Quality and Render At Maximum Depth. Neither of these make a difference.
The footage is also set at Progressive 29.97. Quality 100%. Square Pixels 1.0.
Has anyone else experienced this?
Here is a 100% size screenshot of the two clips opened side-by-side in Quicktime. Have a look.
http://www.carlkingclients.com/premiere484/Premiere_Aliasing.png
-Carl.

So you're taking your original progressive AVCHD content that hasn't ever been transcoded by prelude or anything else and pulling it straight into premiere now right? 
Okay so if I'm understanding correctly you now tried  to make a progressive sequence then place your progressive footage in the timeline then export it as progressive from Premiere pro's progressive timeline?  Then after you do this is it messed up in both VLC and Quicktime? If you have done this just for fun I'd like to have you just use the upper field first sequence you said it creates you and try exporting to both progressive and upper just to see if this changes anything.
Also when you right click the clip in your footage bin and click "modify>interpet" what does it say the field order is (next to "use field order from file" or w/e)
I just want to be sure I am understanding you. However If you could please upload a very small portion of the original .MTS  AVCHD footage you're using that hasn't been altered for testing purposes that would be great I'm intrested to see for myself If I can find/reproduce the problem you're experincing.
I haven't ever seen this occur before unless some sort of setting is incorrect somewhere.   (Except when I have scaled something but even then there is always a workaround. )

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